Even a super-inexpensive mic preamp like the $39 Behringer The SK-1DI is a 500 Series Mic Preamp DIY KIT with built-in DI input. The Essence of Simple, Class-A Vacuum Tube Circuitry DIY audio balanced preamp. A channel strip-like the Joemeek threeQ-offers a one-stop. Then sell it for $1000 or more! This kit is intended for DIY audio balanced preamp.
Yes, a 5-10% lower voltage on the B+ (common term for the high voltage pwoer supply) would not make it worse. I know nothing of vacuum tube circuits, but a buddy of mine has given me an old Gates tube console that is in pretty bad shape (not functioning, fairly torn apart and missing many bits, but still has most iron and tubes in it).
Vintage instrumentation Bruel' s (the ancestors of the DPA' s) are great microphones that can be found on the surplus market and are appropriate to use for recording applications, if you know which ones and an input board, with the input attenuators, the selector and the volume control, an amplification board, with the last powere supply bypass capacitors, the active devices circuits and the output coupling capacitors. NOTE: It is always advisable to change preamp tubes one at a time. Gyraf doesn't sell kits, but they have a diy page with a link to a place that may make pcbs for the designs. The DIY Nutube Preamp At the Burning Amp Festival 2017 I presented a version of a preamp using the Korg Nutube dual Triode.
I, like many, have seen the "Famous $5 Preamp", but I need high end quality, comparable to something like a Trident 80 series. frequency that it's easy to filter, and above the audible range. I started with the best microphone input transformer I could find (at least without having something custom made). Click Images to Large View Diyerzone Diy Hifi 12au712ax7 Tube Preamplifier Board tube mic microphone preamp. caps Samsung 470uF/100V, four per channel. It is the fourth module of the Sound Skulptor range of DIY kits which includes 4 microphone pres based on "classic" designs. Dual Channel Tube Microphone Preamp: Objective: I wanted to build a tube-based microphone preamplifier from one of the classic designs of the 1940's - 1960's.
#DIY 500 SERIES KITS FULL#
Price is for full kit (anode and filament PSU + phantom PSU).